Branch: Tag:

2018-01-29

2018-01-29 16:45:57 by Henrik Grubbström (Grubba) <grubba@grubba.org>

Updated to 2018c.

68:   # 0:00 WET WEST WEMT Western Europe   # 0:19:32.13 AMT* NST* Amsterdam, Netherlands Summer (1835-1937)   # 1:00 BST British Standard (1968-1971) + # 1:00 IST GMT Irish Standard (1968-) with winter DST   # 1:00 CET CEST CEMT Central Europe   # 1:00:14 SET Swedish (1879-1899)   # 1:36:34 RMT* LST* Riga, Latvian Summer (1880-1926)*   # 2:00 EET EEST Eastern Europe   # 3:00 MSK MSD MDST* Moscow    - # From Peter Ilieve (1994-12-04), - # The original six [EU members]: Belgium, France, (West) Germany, Italy, + # From Peter Ilieve (1994-12-04), re EEC/EC/EU members: + # The original six: Belgium, France, (West) Germany, Italy,   # Luxembourg, the Netherlands.   # Plus, from 1 Jan 73: Denmark, Ireland, United Kingdom.   # Plus, from 1 Jan 81: Greece.
278:   # The following claim by Shanks & Pottenger is possible though doubtful;   # we'll ignore it for now.   # * Dublin's 1971-10-31 switch was at 02:00, even though London's was 03:00. +  + # From Paul Eggert (2017-12-04):   # -  + # Dunsink Observatory (8 km NW of Dublin's center) was to Dublin as + # Greenwich was to London. For example:   # - # Whitman says Dublin Mean Time was -0:25:21, which is more precise than - # Shanks & Pottenger. - # Perhaps this was Dunsink Observatory Time, as Dunsink Observatory - # (8 km NW of Dublin's center) seemingly was to Dublin as Greenwich was - # to London. For example: - # +    # "Timeball on the ballast office is down. Dunsink time."   # -- James Joyce, Ulysses -  + # + # The abbreviation DMT stood for "Dublin Mean Time" or "Dunsink Mean Time"; + # this being Ireland, opinions differed. + # + # Whitman says Dublin/Dunsink Mean Time was UT-00:25:21, which agrees + # with measurements of recent visitors to the Meridian Room of Dunsink + # Observatory; see Malone D. Dunsink and timekeeping. 2016-01-24. + # <https://www.maths.tcd.ie/~dwmalone/time/dunsink.html>. Malone + # writes that the Nautical Almanac listed UT-00:25:22 until 1896, when + # it moved to UT-00:25:21.1 (I confirmed that the 1893 edition used + # the former and the 1896 edition used the latter). Evidently the + # news of this change propagated slowly, as Milne 1899 still lists + # UT-00:25:22 and cites the International Telegraph Bureau. As it is + # not clear that there was any practical significance to the change + # from UT-00:25:22 to UT-00:25:21.1 in civil timekeeping, omit this + # transition for now and just use the latter value, omitting its + # fraction since our format cannot represent fractions.      # "Countess Markievicz ... claimed that the [1916] abolition of Dublin Mean Time   # was among various actions undertaken by the 'English' government that
347:   # regulations. I spoke this morning with the Secretary of the Department of   # Justice (tel +353 1 678 9711) who confirmed to me that the correct name is   # "Irish Summer Time", abbreviated to "IST". + # + # From Paul Eggert (2017-12-07): + # The 1996 anonymous contributor's goal was to determine the correct + # abbreviation for summer time in Dublin and so the contributor + # focused on the "IST", not on the "Irish Summer Time". Though the + # "IST" was correct, the "Irish Summer Time" appears to have been an + # error, as Ireland's Standard Time (Amendment) Act, 1971 states that + # standard time in Ireland remains at UT +01 and is observed in + # summer, and that Greenwich mean time is observed in winter. (Thanks + # to Derick Rethans for pointing out the error.) That is, when + # Ireland amended the 1968 act that established UT +01 as Irish + # Standard Time, it left standard time unchanged and established GMT + # as a negative daylight saving time in winter. So, in this database + # IST stands for Irish Summer Time for timestamps before 1968, and for + # Irish Standard Time after that. See: + # http://www.irishstatutebook.ie/eli/1971/act/17/enacted/en/print      # Michael Deckers (2017-06-01) gave the following URLs for Ireland's   # Summer Time Act, 1925 and Summer Time Orders, 1926 and 1947: - # http://www.irishstatutebook.ie/eli/1925/act/8/enacted/en/print.html - # http://www.irishstatutebook.ie/eli/1926/sro/919/made/en/print.html - # http://www.irishstatutebook.ie/eli/1947/sro/71/made/en/print.html + # http://www.irishstatutebook.ie/eli/1925/act/8/enacted/en/print + # http://www.irishstatutebook.ie/eli/1926/sro/919/made/en/print + # http://www.irishstatutebook.ie/eli/1947/sro/71/made/en/print      # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S   # Summer Time Act, 1916
476:   Link Europe/London Europe/Guernsey   Link Europe/London Europe/Isle_of_Man    + # From Paul Eggert (2018-01-19): + # The following is like GB-Eire and EU, except with standard time in + # summer and negative daylight saving time in winter. + # Although currently commented out, this will need to become uncommented + # once the ICU/OpenJDK workaround is removed; see below. + # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S + #Rule Eire 1971 only - Oct 31 2:00u -1:00 GMT + #Rule Eire 1972 1980 - Mar Sun>=16 2:00u 0 IST + #Rule Eire 1972 1980 - Oct Sun>=23 2:00u -1:00 GMT + #Rule Eire 1981 max - Mar lastSun 1:00u 0 IST + #Rule Eire 1981 1989 - Oct Sun>=23 1:00u -1:00 GMT + #Rule Eire 1990 1995 - Oct Sun>=22 1:00u -1:00 GMT + #Rule Eire 1996 max - Oct lastSun 1:00u -1:00 GMT +    # Zone NAME GMTOFF RULES FORMAT [UNTIL]   Zone Europe/Dublin -0:25:00 - LMT 1880 Aug 2 -  -0:25:21 - DMT 1916 May 21 2:00s # Dublin MT +  -0:25:21 - DMT 1916 May 21 2:00s    -0:25:21 1:00 IST 1916 Oct 1 2:00s    0:00 GB-Eire %s 1921 Dec 6 # independence    0:00 GB-Eire GMT/IST 1940 Feb 25 2:00s
487:    0:00 1:00 IST 1947 Nov 2 2:00s    0:00 - GMT 1948 Apr 18 2:00s    0:00 GB-Eire GMT/IST 1968 Oct 27 + # From Paul Eggert (2018-01-18): + # The next line should look like this: + # 1:00 Eire IST/GMT + # However, in January 2018 we discovered that the Eire rules cause + # problems with tests for ICU: + # https://mm.icann.org/pipermail/tz/2018-January/025825.html + # and with tests for OpenJDK: + # https://mm.icann.org/pipermail/tz/2018-January/025822.html + # To work around this problem, use a traditional approximation for + # time stamps after 1971-10-31 02:00 UTC, to give ICU and OpenJDK + # developers breathing room to fix bugs. This approximation has + # correct UTC offsets, but results in tm_isdst flags are the reverse + # of what they should be. This workaround is temporary and should be + # removed reasonably soon.    1:00 - IST 1971 Oct 31 2:00u    0:00 GB-Eire GMT/IST 1996    0:00 EU GMT/IST -  + # End of workaround for ICU and OpenJDK bugs.    -  +    ###############################################################################      # Europe    - # EU rules are for the European Union, previously known as the EC, EEC, - # Common Market, etc. + # The following rules are for the European Union and for its + # predecessor organization, the European Communities. + # For brevity they are called "EU rules" elsewhere in this file.      # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S   Rule EU 1977 1980 - Apr Sun>=1 1:00u 1:00 S
929:   # The page http://www.retsinfo.dk/_GETDOCI_/ACCN/A18930008330-REGL   # confirms this, and states that the law was put forth 1893-03-29.   # - # The EU treaty with effect from 1973: + # The EU [actually, EEC and Euratom] treaty with effect from 1973:   # http://www.retsinfo.dk/_GETDOCI_/ACCN/A19722110030-REGL   #   # This provoked a new law from 1974 to make possible summer time changes
985:   # East Greenland and Franz Josef Land, but we don't know their time zones.   # My source for this is Wilhelm Dege's book mentioned under Svalbard.   # - # From Paul Eggert (2006-03-22): - # Greenland joined the EU as part of Denmark, obtained home rule on 1979-05-01, - # and left the EU on 1985-02-01. It therefore should have been using EU + # From Paul Eggert (2017-12-10): + # Greenland joined the European Communities as part of Denmark, + # obtained home rule on 1979-05-01, and left the European Communities + # on 1985-02-01. It therefore should have been using EU   # rules at least through 1984. Shanks & Pottenger say Scoresbysund and Godthåb   # used C-Eur rules after 1980, but IATA SSIM (1991/1996) says they use EU   # rules since at least 1991. Assume EU rules since 1980.
1301:   # From Markus Kuhn (1998-09-29):   # The German time zone web site by the Physikalisch-Technische   # Bundesanstalt contains DST information back to 1916. - # [See tz-link.htm for the URL.] + # [See tz-link.html for the URL.]      # From Jörg Schilling (2002-10-23):   # In 1945, Berlin was switched to Moscow Summer time (GMT+4) by
1398:    1:00 Greece CE%sT 1944 Apr 4    2:00 Greece EE%sT 1981    # Shanks & Pottenger say it switched to C-Eur in 1981; -  # go with EU instead, since Greece joined it on Jan 1. +  # go with EU rules instead, since Greece joined Jan 1.    2:00 EU EE%sT      # Hungary
2097:   # IATA SSIM (1991/1992) reports that the Azores were at -1:00.   # IATA SSIM (1993-02) says +0:00; later issues (through 1996-09) say -1:00.   # Guess that the Azores changed to EU rules in 1992 (since that's when Portugal - # harmonized with the EU), and that they stayed +0:00 that winter. + # harmonized with EU rules), and that they stayed +0:00 that winter.   #   # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S   # DSH writes that despite Decree 1,469 (1915), the change to the clocks was not
2772:   #   # https://regnum.ru/news/society/1957270.html   # has some historical data for Altai Krai: - # before 1957: west part on UTC+6, east on UTC+7 - # after 1957: UTC+7 - # since 1995: UTC+6 + # before 1957: west part on UT+6, east on UT+7 + # after 1957: UT+7 + # since 1995: UT+6   # http://barnaul.rusplt.ru/index/pochemu_altajskij_kraj_okazalsja_v_neprivychnom_chasovom_pojase-17648.html   # confirms that and provides more details including 1995-05-28 transition date.   
3582:   # The change is permanent, so this is the new standard time in Turkey.   # It takes effect today, which is not much notice.    + # From Kıvanç Yazan (2017-10-28): + # Turkey will go back to Daylight Saving Time starting 2018-10. + # http://www.resmigazete.gov.tr/eskiler/2017/10/20171028-5.pdf + # + # From Even Scharning (2017-11-08): + # ... today it was announced that the DST will become "continuous": + # http://www.hurriyet.com.tr/son-dakika-yaz-saati-uygulamasi-surekli-hale-geldi-40637482 + # From Paul Eggert (2017-11-08): + # Although Google Translate misfires on that source, it looks like + # Turkey reversed last month's decision, and so will stay at +03. +    # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S   Rule Turkey 1916 only - May 1 0:00 1:00 S   Rule Turkey 1916 only - Oct 1 0:00 0 -